Top 10 Accessibility Testing Companies for 2025 Projects

In 2025, digital products are expected to serve everyone and that includes users with visual, auditory, cognitive, and motor impairments.

If you’re launching a mobile app, scaling an enterprise SaaS platform, or updating a public-facing website, accessibility is a legal requirement, a usability advantage, and increasingly, a competitive differentiator.

Yet many teams struggle to meet standards like WCAG, ADA, or Section 508 — especially when accessibility testing is bolted on late in the development cycle. That’s why partnering with top-rated digital accessibility testing companies has become a practical and strategic move.

The best digital accessibility QA companies do more than run audits. They bring a deep understanding of assistive technologies, user behavior, and legal risk — helping you catch what automated tools miss. They also support your internal teams in building a more accessible culture from the inside out.

This guide highlights the top accessibility testing firms with a proven track record in delivering real-world results.

Best Digital Accessibility Testing Companies

When it comes to accessibility, surface-level audits aren’t enough. What separates average vendors from the best accessibility testing firms is their ability to spot what automated tools can’t and help teams make meaningful, lasting improvements.

These top accessibility testing firms don’t just hand you a checklist — they combine technical audits with UX insights, legal guidance, and assistive tech expertise.

#1. TestFort

TestFort is an impact-driven QA services provider specializing in end-to-end accessibility testing across multiple platforms and industries. Part of the QArea Group with over 250 specialists, TestFort has delivered quality engineering solutions since 2001, serving enterprise and mid-market businesses globally.

Services

Mobile app accessibility testing (iOS and Android);
Enterprise software accessibility validation;
Automated testing integration with manual expert review;
Custom accessibility training programs;
AI-enhanced accessibility testing with predictive defect analysis;
Dedicated accessibility QA teams for scalable testing operations;
Compliance-focused accessibility audits for regulatory requirements;
Self-healing test frameworks for continuous accessibility monitoring.

Specializations

Healthcare: HIPAA-compliant accessibility solutions for medical platforms;
Fintech: Banking and financial services accessibility with security focus;
eCommerce: Shopping platform optimization for users with disabilities;
Enterprise software: Large-scale accessibility validation for complex business applications.

They offer scalable QA teams that can grow with project needs and provide detailed, developer-friendly reports with specific remediation steps. Their multi-layered testing approach combines tools and human expertise with rapid turnaround times for urgent compliance deadlines. As an ISO 27001-certified, CMMI Level 3 company with global presence across USA, Malta, UK, and Europe, they bring enterprise-grade quality backed by 24 years of experience and recognition as European Software Testing Awards winners.

Notable clients: Skype, Dashlane, HuffPost, RebelMouse.

Best for: Mid to large companies needing comprehensive accessibility QA with industry-specific expertise, particularly those requiring enterprise-grade compliance and security standards.

#2. Deque Systems

Industry pioneer and leader in digital accessibility, founded in 1999, offering both powerful testing tools and expert consulting services.

Axe DevTools suite (browser extensions, CLI tools, API integrations);
Comprehensive accessibility audits and assessments;
Developer training and certification programs;
Strategic accessibility consulting and roadmap development;
Automated testing integration for CI/CD pipelines.

Deque Systems created the most widely-used open-source accessibility testing library and bring deep technical expertise through their involvement in WCAG guidelines development. Their developer-centric approach features extensive documentation and emphasizes “shift-left” accessibility integration.

#3. TPGi (The Paciello Group)

Full-service accessibility consultancy combining strategic guidance, technical audits, and ongoing support through their comprehensive ARC platform.

Complete accessibility audits with UX recommendations;
ARC platform for enterprise accessibility management;
Remediation support and implementation guidance;
Accessibility strategy and policy development;
Training and capability building programs.

TPGi provides full lifecycle support from strategy to implementation with seamless integration into existing development workflows. Their approach emphasizes user experience alongside compliance and includes extensive knowledge base and documentation resources.

#4. Level Access

Established accessibility leader with over 30 years of experience, specializing in enterprise and government accessibility solutions.

Strategic accessibility consulting and program development;
Comprehensive compliance testing and validation;
Legal and regulatory guidance for global standards;
Long-term managed accessibility services;
Policy development and implementation support.

Level Access brings decades of experience with complex enterprise environments and maintains strong relationships with legal and regulatory bodies. Their managed service model provides ongoing accessibility support, while their deep expertise in government and public sector requirements makes them particularly well-suited for regulated industries.

#5. Applause

Unique crowd-powered testing platform that connects companies with real users with disabilities for authentic accessibility validation.

Real-user accessibility testing with people with disabilities;
Usability testing across diverse assistive technologies;
Mobile and web platform validation on actual devices;
Rapid feedback collection from the global user community;
Comprehensive usability and accessibility reporting.

Applause is the only platform offering real user testing at scale, focusing on usability and user experience rather than just technical compliance. They provide rapid turnaround with actionable insights from actual users and maintain a global reach through their diverse user community.

#6. Siteimprove

All-in-one digital optimization platform that combines accessibility testing with content management, SEO, and performance monitoring.

Automated accessibility monitoring and scanning;
Content optimization and editorial workflow integration;
SEO and performance analytics alongside accessibility;
CMS integrations with popular platforms;
Policy and governance tools for large organizations.

Siteimprove takes a holistic approach that combines accessibility with broader digital quality, featuring a user-friendly interface that’s accessible to non-technical team members. Their strong CMS integrations support content teams, and they emphasize ongoing monitoring rather than one-time audits.

#7. QA InfoTech (Qualitest)

Global QA services provider offering accessibility testing as part of comprehensive software quality assurance solutions.

Web and mobile accessibility testing;
International compliance standards support;
Integration with broader QA and testing services;
Cost-effective accessibility solutions for various budgets;
Specialized mobile accessibility expertise.

QA InfoTech offers strong mobile accessibility testing capabilities and cost-effective solutions for budget-conscious organizations. As part of a larger QA ecosystem, they provide comprehensive testing needs coverage and bring experience with international compliance requirements.

#8. User1st

Modern accessibility company combining AI-powered scanning technology with expert human validation and remediation consulting.

AI-enhanced accessibility scanning and detection;
Expert manual testing and validation;
Real-time remediation guidance and support;
Enterprise platform integrations;
Continuous accessibility monitoring.

User1st achieve the perfect balance of automation efficiency and human expertise, providing real-time remediation insights during development. Their scalable platform is designed for large enterprise teams and features a modern, developer-friendly approach to accessibility.

#9. TestPros

U.S.-based accessibility testing firm specializing in government and compliance-heavy environments, particularly Section 508 and federal requirements.

Section 508 compliance testing and validation;
VPAT (Voluntary Product Accessibility Template) creation;
Federal and state government accessibility consulting;
Audit readiness and documentation support;
Defense and security sector accessibility expertise.

TestPros maintain a specialized focus on government and federal requirements and are trusted by defense and security organizations. Their approach emphasizes strong documentation and audit readiness, supported by a U.S.-based team with security clearance capabilities.

#10. Accessible360

Human-centered accessibility company focusing on real-world user validation and long-term accessibility partnerships rather than just compliance checking.

Human-first accessibility testing with real user validation;
Comprehensive remediation and implementation support;
Ongoing accessibility partnership and consulting;
User experience optimization for accessibility;
Custom accessibility training and capability building.

Accessible360 goes beyond checklists to focus on real user experience and provide strong ongoing support during and after accessibility implementation. Their partnership approach rather than vendor relationship emphasizes building organizational accessibility culture for long-term success.

Choosing the right accessibility partner can save your team time, reduce legal risk, and create better experiences for everyone — not just users with disabilities.

If you’re looking for reliable accessibility testing partners for web and mobile apps, this list is a solid starting point — whether your goal is full ADA compliance, WCAG certification, or simply building better products for more people.

Benefits of Collaborating with the Best Accessibility Testing Firms

Choosing one of the best accessibility testing firms brings more than just a compliance checkbox. Here’s what a good partner really delivers:

Expertise in global standards. Whether you’re aiming for WCAG 2.1 AA, ADA compliance, or Section 508 alignment, experienced partners help you get it right — and stay compliant through future updates.

Actionable audits. Beyond automated scans, top vendors provide context-aware reports, prioritize real risks, and guide your team through fixes.

Faster rollout and less risk. Working with a reliable accessibility testing partner for web and mobile apps saves time and significantly reduces the chance of legal or PR issues.

Accessibility culture. Great partners don’t just test — they help your team learn, adapt, and build accessibility into every sprint.

For digital teams, accessibility is both a legal responsibility and a user experience advantage. Getting it wrong can cost you, but getting it right builds trust and inclusion.

How to Choose the Right Accessibility Testing Company

With dozens of top-rated digital accessibility testing companies out there, how do you pick the right one? Focus on what actually impacts your product, team, and long-term accessibility goals. Here are key criteria — along with the right questions to ask — when evaluating potential partners.

1. Understanding of standards

Your QA partner should be fluent in WCAG, ADA, Section 508, EN 301 549, and other relevant accessibility frameworks. Standards evolve — and your vendor should evolve with them.

Inquire: How do you stay current with the latest accessibility guidelines and legal requirements?

2. Full lifecycle support

Great accessibility testing doesn’t start at launch. The best firms support everything from early prototypes and design reviews to staging checks and live audits.

Inquire: Can you support accessibility testing throughout the full product lifecycle — not just audits?

3. Assistive technology testing

Automated tools catch a lot, but not everything. Real testing on tools like JAWS, NVDA, VoiceOver, and keyboard-only navigation is still essential.

Inquire: What assistive technologies do you use in your testing process? How do you validate real-user flows?

4. Real-user feedback

Accessibility is about people. Including users with disabilities in the process helps uncover issues automated tools miss and strengthens usability.

Inquire: Do you include people with disabilities in your testing team or feedback loop?

5. Integration and automation

Accessibility should be part of your workflow — not a blocker. Look for partners that support CI/CD, offer APIs, and work with your version control tools.

Inquire: How does your testing process integrate with our dev pipeline and tools?

6. Experience with mobile & web

Web and mobile accessibility each have unique challenges — and require different skill sets. Your provider should handle both confidently.

Inquire: Can you share examples of accessibility testing you’ve done across both mobile apps and web platforms?

7. Understanding of legal risk

In both the US and EU, accessibility lawsuits are rising — especially in eCommerce, education, and SaaS. A strong partner will help you reduce risk and document compliance.

Inquire: How do you help clients assess legal risk or prepare documentation in case of audits or complaints?

Building Accessible Products Starts with the Right Partner

Digital accessibility is an ongoing commitment to inclusive design and responsible product development. By collaborating with the best digital accessibility QA companies, you’re actively improving your product for real users.

The top accessibility testing firms on this list bring more than tools and audits — they bring experience, perspective, and systems that help teams design for everyone from day one. Whether you’re working on a high-traffic eCommerce site or an internal enterprise tool, a reliable accessibility testing partner for web and mobile apps can help you catch critical issues early, support long-term compliance, and scale with confidence.

If you’re wondering how to choose an accessibility testing company that truly fits your product and team — don’t just focus on checklists or price. Look for partners who understand your platform, your users, and your future plans. Choosing the right partner now means faster fixes, fewer gaps, and a better experience for all.

Author Profile

Adam Regan

Deputy Editor

Features and account management. 3 years media experience. Previously covered features for online and print editions.

Email Adam@MarkMeets.com